Improvement in roller-carriers of printing-press beds



@HHHHHUV X f i H23@ N c. POTTER, 1r: Barriers of Printing-Press`edsf 1f/l. FljL/flG/MFHIC @aM Y fassen/lss Hmm) Bollerhebben UNITED STATES;

PATENT CEEIcE= CHARLES POTTE l, JR., OF NEWT YORK, N. Y.`

Specification forming part of Letters Patent No. 146,841, dated January 27, 1874; application led September 8, 1873.

" ried is, in many printingpresses, reciprocated backward and forward on ways being supported on rollers, which rollers are united in sets by rm pieces, so thatY all are compelled to move together. The distance to Which the rollers and their connecting-frames travel at each stroke is, or should be, exactly half that of the travel of the reciprocating bed.

In practice, machinery is liable to be deranged from various causes. The impression is given when the rollers are near one end of their travel, and, for some reason, there is a tendency of the entire sets to work, by degrees, too far toward that-end of their path. This can be resisted by end stops, but with such provision the slight sliding motion necessa-ry to rectify the position takes `place while the rollers are at the impression end of their motion, and subject to a very heavy load. It is desirable that such rectification be eected at the other end of the motion, if possible. Then the rollers are subject to a much less load. The ordinary end stops are, furthermore, unsatisfactory, because, if the rollers become stuck, from any cause, at or near one end of their path, the bed is liable, in its return motion, to slide too fa-r off the entire setof rollers, and to be broken, or to ca-use other serious damage. An attempt has been made to overcome this evil by the introduction of gearing which shall mesh into the roller-frame and compel its motionto the right extent. I have discovered that the end can be attained Without any such addition to the mechanism.

The following is what I consider the best means of carrying out the invention: I provide simply a stop projecting from the bed at `each side, and corresponding stops at the termediate rollers and roller-frame, and the crank which imparts motion to the bed.

Those parts ofthe printingpress not here represented may be of any ordinary or suitable character.

.A is the supporting-frame of the machine;

are supported on the rollers in the usual manner. The pivots or axes on which the rollers E turn are mounted in the roller-frame in the usual manner,'and the frame is constructed in the usual form, except that it is recessed to produce stops, as indicated by the shoulders g y. These shoulders are under-cut, as represented, so that, a strong contact of the stop on the bed against either of them may not result in a tendency of the bed to lift out of the press. A stop, d, is cast or otherwise firmly fixed on the outer face of each bed bearing-piece D. Its edges are beveled to an extent a little less than the shoulders or stops g g, and are faced with sole-leather, or other slightly elastic inaterial, to soften the concussion when it strikes against its proper shoulder.

In operation, the bed reciproeates in its usual manner, an d the rollers and their connecting-frames reciprocate quietly to an,` extent half as great. This action continues so long as all is working perfectly. Willen, in consequence of any fault, the roller-frame on either side tends to lag behind` its proper place, or to rcmain stuck at either end` of its motion, the stop d on that side of the bed strikes with its leather-cased edge against the adjacent shoul der g, and compels the roller-frame, with its connected rollers, to travel to the proper extent.

By this device the bed reina-ins always propcrly supported, and complicated mechanism is avoided.

r[he Warnin g afforded by the noise is always sufficient to indica-te to the attendant when th .evil from any dera-n gement of the rollers or roller-frames is likely to become serious..

The leather faces can be omitted from the stops to allow a contact of thc. naked metal,

and additional devices may be employed to give a warning sound, by Vibrating tongues or im bell7 if such shall, in any case, be deemed desirable.

The bed7 with its bearing-pieces, is of such length that the end may be attained with tol erable success by a reversion of the position of the severa-l stops-that is, by putting only one stop at the center of the length of each roller-frame, and having two stops on each side of the type-bed or its bearing-pieces.

I claim as my inventionrlhe combination of the reciprocating bed D, carrying stops d, with the :reciproeatin,9,` roller-frame Gr and stops g, whereby the bed and frame are locked together under certain conditions, as specified.

In testimony whereof I have hereunto set my hand this 3d dey of September, 1873, in the presence of two subscribing Witnesses.

C. POTTER, JR. W'itnesses:

THOMAS D. STETSON, WM. C. DEY. 

